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parse_target_selector.go
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/
parse_target_selector.go
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package filter
import (
"regexp"
"strings"
"github.com/pkg/errors"
"github.com/vercel/turbo/cli/internal/turbopath"
)
type TargetSelector struct {
includeDependencies bool
matchDependencies bool
includeDependents bool
exclude bool
excludeSelf bool
followProdDepsOnly bool
parentDir turbopath.RelativeSystemPath
namePattern string
fromRef string
toRefOverride string
raw string
}
func (ts *TargetSelector) IsValid() bool {
return ts.fromRef != "" || ts.parentDir != "" || ts.namePattern != ""
}
// getToRef returns the git ref to use for upper bound of the comparison when finding changed
// packages.
func (ts *TargetSelector) getToRef() string {
if ts.toRefOverride == "" {
return "HEAD"
}
return ts.toRefOverride
}
var errCantMatchDependencies = errors.New("cannot use match dependencies without specifying either a directory or package")
var targetSelectorRegex = regexp.MustCompile(`^(?P<name>[^.](?:[^{}[\]]*[^{}[\].])?)?(?P<directory>\{[^}]*\})?(?P<commits>(?:\.{3})?\[[^\]]+\])?$`)
// ParseTargetSelector is a function that returns pnpm compatible --filter command line flags
func ParseTargetSelector(rawSelector string) (*TargetSelector, error) {
exclude := false
firstChar := rawSelector[0]
selector := rawSelector
if firstChar == '!' {
selector = selector[1:]
exclude = true
}
excludeSelf := false
includeDependencies := strings.HasSuffix(selector, "...")
if includeDependencies {
selector = selector[:len(selector)-3]
if strings.HasSuffix(selector, "^") {
excludeSelf = true
selector = selector[:len(selector)-1]
}
}
includeDependents := strings.HasPrefix(selector, "...")
if includeDependents {
selector = selector[3:]
if strings.HasPrefix(selector, "^") {
excludeSelf = true
selector = selector[1:]
}
}
matches := targetSelectorRegex.FindAllStringSubmatch(selector, -1)
if len(matches) == 0 {
if relativePath, ok := isSelectorByLocation(selector); ok {
return &TargetSelector{
exclude: exclude,
includeDependencies: includeDependencies,
includeDependents: includeDependents,
parentDir: relativePath,
raw: rawSelector,
}, nil
}
return &TargetSelector{
exclude: exclude,
excludeSelf: excludeSelf,
includeDependencies: includeDependencies,
includeDependents: includeDependents,
namePattern: selector,
raw: rawSelector,
}, nil
}
fromRef := ""
toRefOverride := ""
var parentDir turbopath.RelativeSystemPath
namePattern := ""
preAddDepdencies := false
if len(matches) > 0 && len(matches[0]) > 0 {
match := matches[0]
namePattern = match[targetSelectorRegex.SubexpIndex("name")]
rawParentDir := match[targetSelectorRegex.SubexpIndex("directory")]
if len(rawParentDir) > 0 {
// trim {}
rawParentDir = rawParentDir[1 : len(rawParentDir)-1]
if rawParentDir == "" {
return nil, errors.New("empty path specification")
} else if relPath, err := turbopath.CheckedToRelativeSystemPath(rawParentDir); err == nil {
parentDir = relPath
} else {
return nil, errors.Wrapf(err, "invalid path specification: %v", rawParentDir)
}
}
rawCommits := match[targetSelectorRegex.SubexpIndex("commits")]
if len(rawCommits) > 0 {
fromRef = rawCommits
if strings.HasPrefix(fromRef, "...") {
if parentDir == "" && namePattern == "" {
return &TargetSelector{}, errCantMatchDependencies
}
preAddDepdencies = true
fromRef = fromRef[3:]
}
// strip []
fromRef = fromRef[1 : len(fromRef)-1]
refs := strings.Split(fromRef, "...")
if len(refs) == 2 {
fromRef = refs[0]
toRefOverride = refs[1]
}
}
}
return &TargetSelector{
fromRef: fromRef,
toRefOverride: toRefOverride,
exclude: exclude,
excludeSelf: excludeSelf,
includeDependencies: includeDependencies,
matchDependencies: preAddDepdencies,
includeDependents: includeDependents,
namePattern: namePattern,
parentDir: parentDir,
raw: rawSelector,
}, nil
}
// isSelectorByLocation returns true if the selector is by filesystem location
func isSelectorByLocation(rawSelector string) (turbopath.RelativeSystemPath, bool) {
if rawSelector[0:1] != "." {
return "", false
}
// . or ./ or .\
if len(rawSelector) == 1 || rawSelector[1:2] == "/" || rawSelector[1:2] == "\\" {
return turbopath.MakeRelativeSystemPath(rawSelector), true
}
if rawSelector[1:2] != "." {
return "", false
}
// .. or ../ or ..\
if len(rawSelector) == 2 || rawSelector[2:3] == "/" || rawSelector[2:3] == "\\" {
return turbopath.MakeRelativeSystemPath(rawSelector), true
}
return "", false
}